In judo one tries to throw the partner so that he or she will land on their side in perfect breakfall position and thereby get a full point and a win. Thus nage supplies the necessary rotation. In aikido, one tries to throw the partner so that he or she will land on their face/shoulder and thereby ensure that there will not be a second attack.
There will be no second attack after a good Judo toss as well. We can aim the noggin' as well as an attacker's back to concrete/floor/wall. I'm probably a little over-sensitive to this, but good Judo is a budo first...a sport second.
I suggest all martial artists to learn some Judo breakfalls. In the first month I was in Judo, I fell on some slippery concrete steps. My limited Judo knowledge probably saved my life. Go work with some friendly Judo people. They should gladly help you with any fall.